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 ###Instrução: Quantas pontuações diferentes existem para o Verizon Classic?
 ###Tabelas: CREATE TABLE doubles_7 (doubles_7_id AUTO_INCREMENT PRIMARY KEY, Edition VARCHAR, Round VARCHAR, Date VARCHAR, Partnering VARCHAR, Against VARCHAR, Surface VARCHAR, Opponents VARCHAR, W–L VARCHAR, Result VARCHAR) CREATE TABLE tournament_results (tournament_results_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Tournament VARCHAR, Location VARCHAR, Purse( $ ) INT, Winner VARCHAR, Score VARCHAR, 1st Prize( $ ) INT) CREATE TABLE per_capita_gdp (per_capita_gdp_id AUTO_INCREMENT PRIMARY KEY, Economy VARCHAR, 1980 INT, Gap from Thailand as of 1980 (times) VARCHAR, 1985 INT, 1990 INT, 1995 INT, 2000 INT, 2005 INT, 2010 INT, 2012 INT, Gap from Thailand as of 2012 (times) VARCHAR, GDP as of 2012 after purchasing power parity (PPP) calculations (USD billions) VARCHAR, GDP per capita as of 2012 (PPP) INT) CREATE TABLE challengers_and_futures_17 (challengers_and_futures_17_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Tournament VARCHAR, Surface VARCHAR, Opponent in the final VARCHAR, Score VARCHAR) CREATE TABLE us_nielsen_ratings (us_nielsen_ratings_id AUTO_INCREMENT PRIMARY KEY, Rating INT, Share INT, Rating/Share (18-49) VARCHAR, Viewers (millions) INT, Rank (Overall) VARCHAR)  
SELECT COUNT Score FROM tournament_results WHERE Tournament = Verizon Classic